1. GEO Architecture Subgroup Progress Report Architecture SG Co-chairs Yoji Furuhama / JAXA (presenter) Donald Hinsman / WMO Ivan DeLoatch / USGS

2. Group on Earth bservations Group on Earth bservations GEO-4 Tokyo. Japan2 Mission of Architecture Subgroup The Subgroup on Architecture will develop an architecture development strategy for a comprehensive, coordinated, and sustained Earth observation system or systems This includes in situ, airborne, and space-borne observations, and builds on existing activities, systems, and initiatives

3. Group on Earth bservations Group on Earth bservations GEO-4 Tokyo. Japan3 Alternative System Strategies D (recommended) - A system of systems supplemented by new observing components as and where required. Existing systems maintain their mandates and new observing components are added Interfaces are needed among observing components Members and participating organizations agree on interoperability specifications and support a common network structure for exchange and dissemination of observational data Approved at GEO-2:

4. Group on Earth bservations Group on Earth bservations GEO-4 Tokyo. Japan4 Status Report Since GEO-3 (1/2 ) [Status] Architecture Report :Submitted to GEOSEC on March 19 th Functional View of GEOSS : Completed and to become an addendum. [Future Work] Depending on GEO-4 / IPTT guidance.

5. Group on Earth bservations Group on Earth bservations GEO-4 Tokyo. Japan5 Status Report Since GEO-3 (2/2 ) [Status] System Inventory is being compiled, starting within Architecture SG. Initial informal candidate systems : WWW/GOS, GCOS, GOOS A liaison officer to IPTT : Dr. Hinsman (WMO) [Future Work] IPTT coordination is expected.

6. Group on Earth bservations Group on Earth bservations GEO-4 Tokyo. Japan6 Comments on Draft Outline of 10-year Implementation Plan (1)Assure the concept of a system of systems is prominent. (2) How to include SG outputs into relevant section of the 10-year Implementation Plan. (3) Need hierarchy of documents for the 10-year Implementation Plan at EOS III, for example Political Declaration, Executive summary, Details.